## Startup showcase (1-1 of 1)

### Plane
Open-source project management: work items, cycles and wiki

61,558 GitHub stars (makeplane/plane, AGPL-3.0, 2026-10-27) · App Store 3.3/5 from 17 ratings (2026-10-27)

Website + app · Productivity · by Plane Software, Inc. · launched 2022-11-19. https://plane.so

- Frontend: React Router, MobX
- Backend: Django, Celery, RabbitMQ
- Database: PostgreSQL, Valkey
- Realtime: Hocuspocus, Yjs
- Storage & media: S3-compatible storage
- AI: OpenAI API (`openai`, priced)

Most used: Celery (1), Django (1), Hocuspocus (1), MobX (1), OpenAI API (1), PostgreSQL (1), RabbitMQ (1), React Router (1), S3-compatible storage (1), Valkey (1), Yjs (1).

**Caveats (show these word for word)**
- Stacks are read from each product's public code (manifests and environment templates) on the date shown; a service listed there may be optional or used only by the hosted version. GitHub and App Store figures are as read on their checked_at date.

Confidence: medium.

Use estimate_cost or audit_stack with the priced vendor ids to see what a stack like this costs.